package com.android.personal.kotlin.control;

/**
 * Created by zhangwentao on 2016/12/14.
 *
 * 被观察者
 */

public interface Watched {

    void addWatcher(Watcher watcher);

    void removeWatcher(Watcher watcher);

    void notifyWatchers(IssueKey string, Object o);

}
